package com.ycl.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.ycl.common.BaseThread;
import com.ycl.common.CustomException;
import com.ycl.entity.*;
import com.ycl.mapper.OrdersMapper;
import com.ycl.service.*;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Slf4j
@Service
public class OrdersServiceImpl extends ServiceImpl<OrdersMapper, Orders> implements OrdersService{
    @Autowired
    ShoppingCartService shoppingCartService;
    @Autowired
    UserService userService;
    @Autowired
    AddressBookService addressBookService;
    @Autowired
    OrderDetailService orderDetailService;
    /**
     * 用户下单
     * @param orders
     */
    @Override
    @Transactional
    public void submit(Orders orders) {
        // 获取当前用户ID
        Long userId = BaseThread.getCurrentId();
        // 查询当前用户购物车数据
        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,userId);
        List<ShoppingCart> shoppingCarts = shoppingCartService.list(queryWrapper);
        if (shoppingCarts == null && shoppingCarts.size() == 0){
            throw new CustomException("购物车为空，不能下单");
        }
        // 查询用户
        User user = userService.getById(userId);
        // 查询地址
        AddressBook addressBook = addressBookService.getById(orders.getAddressBookId());
        if (addressBook == null){
            throw new CustomException("未添加地址信息，不能下单");
        }
        // (先像orders里插入数据)

        long orderId = IdWorker.getId();// 订单号
        AtomicInteger amount = new AtomicInteger(0);// 原子整型  多线程安全
        List<OrderDetail> orderDetailList = shoppingCarts.stream().map((item)->{
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());

        orders.setId(orderId); // 设置订单Id
        orders.setNumber(String.valueOf(orderId)); //设置订单号
        orders.setOrderTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));// 总金额
        orders.setUserId(userId);
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setAddress((addressBook.getProvinceName() == null ? "":addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "":addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "":addressBook.getDistrictName())
                +(addressBook.getDetail() == null ? "":addressBook.getDetail())
        );
        // 向订单表插入数据，一条数据
        this.save(orders);
        // 向订单明细表插入数据，可能是多条数据
        orderDetailService.saveBatch(orderDetailList);
        // 清空购物车
        shoppingCartService.remove(queryWrapper);
    }
}
